Patent US2471602A successfully refreshed from Google Patents.
US2471602A
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Treatment of hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1944-05-01
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Granted: 1949-05-31
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Expires: 1964-05-01
Abstract
No abstract record available.
Inventors
- 👤 Philip M Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:08
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; C; C07; C07C; C07C7/00; C07C7/005; C07C7/04; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0252; F25J2200/00; F25J2200/04; F25J2200/74; F25J2205/00; F25J2205/02; F25J2210/00; F25J2210/04; F25J2210/12; F25J2215/00; F25J2215/62; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |